daylight robbery vs vampirism

daylight robbery

noun
  • Conduct which unfairly deprives an opponent of an advantage or a win; (countable, rare) an instance of this. 

  • Used other than figuratively or idiomatically: see daylight, robbery. 

  • The practice of cheating or of imposing an exorbitant charge for a product or service; (countable, rare) an instance of this. 

vampirism

noun
  • extortion 

  • practices associated with vampires, in particular blood-drinking and the draining of a victim's life-force. 

  • Systemic lupus erythematosus (autoimmune disease) 

  • the state of being a vampire 

How often have the words daylight robbery and vampirism occurred in a corpus of books? (source: Google Ngram Viewer )